<template>
<div>
     <!-- 面包屑导航start -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>商品管理</el-breadcrumb-item>
          <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
    <!-- 面包屑导航end -->

    <!-- 卡片视图start -->
    <el-card>
        <!-- 警告提示区域start -->
        <el-alert title="添加商品信息" type="info" center show-icon></el-alert>
        <!-- 警告提示区域end -->

        <!-- 步骤条start -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
        <!-- 步骤条end -->

        <!-- Tabs标签页start -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs v-model="activeIndex"    :tab-position="'left'" :before-leave="beforeLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number"></el-input>
                        </el-form-item>
                         <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps" expand-trigger="hover" @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                       <el-form-item :label="item.attr_name" v-for="item in manyTableDate" :key="item.id">
                            <el-checkbox-group v-model="item.attr_vals" >
                                <el-checkbox :label="item2" v-for="(item2) in item.attr_vals" :key="item2.id" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableDate" :key="item.id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headersObj" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                         <el-button type="primary" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        <!-- Tabs标签页end -->
    </el-card>
    <!-- 卡片视图start -->

    <!--图片预览start -->
        <el-dialog
        title="图片预览"
        :visible.sync="previewVisble"
        width="50%">
        <img :src="previewPath" alt="">
        </el-dialog>
    <!--图片预览end -->

</div>
</template>

<script>
import _ from 'lodash'

export default {
  data () {
    return {
      activeIndex: 0,
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      cateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      //   动态参数列表数据
      manyTableDate: [],
      //   静态参数列表数据
      onlyTableDate: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisble: false
    }
  },
  created () {
    this.getAddList()
  },
  methods: {
    // 获取商品分类列表
    async getAddList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 触发级联选中项的变化
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 阻止页签切换
    beforeLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    //  当选中tabs页签触发的事件
    async tabClicked () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableDate = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        this.onlyTableDate = res.data
      }
    },
    // 图片预览效果
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisble = true
    },
    // 图片移除
    handleRemove (file) {
      console.log(file)
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(k =>
        k.pic === filePath
      )
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功事件
    handleSuccess (response) {
      const picInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 通过校验规则完成添加商品
    add () {
      this.$refs.addFormRef.validate(async vali => {
        if (!vali) {
          return this.$message.error('请填写必要的表单项!')
        }
        // 深拷贝 this.addForm
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')

        // 处理动态参数
        this.manyTableDate.forEach(item => {
          const manyInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(manyInfo)
        })
        // 处理静态属性
        this.onlyTableDate.forEach(item => {
          const onlyInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(onlyInfo)
        })
        form.attrs = this.addForm.attrs

        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}

</script>

<style lang="less" scoped>
    .el-checkbox {
        margin: 0 9px 0 0 !important;
    }
</style>
